Fig. 21
From: Assessment of hepatocellular carcinoma treatment response with LI-RADS: a pictorial review
a Axial T1-weighted MR in late arterial phase (AP) obtained pretreatment: image shows nonrim arterial phase hyperenhancement (APHE) of a 3-cm LR-5 observation in segments II-III (arrow). b Unenhanced axial CT obtained immediately post transarterial chemoembolization (TACE) of segment III: image shows suboptimal targeting with incomplete ethiodized oil retention (arrow). c Unenhanced axial CT obtained post repeat TACE: image shows extended treatment area with optimal targeting (arrow). Postcontrast imaging (not shown) did not show APHE or washout, the treated observation is categorized LR-TR Nonviable